51384916 has 12 divisors (see below), whose sum is σ = 98098560. Its totient is φ = 23356760.

The previous prime is 51384869. The next prime is 51384917. The reversal of 51384916 is 61948315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51384917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583876 + ... + 583963.

It is an arithmetic number, because the mean of its divisors is an integer number (8174880).

Almost surely, 2^51384916 is an apocalyptic number.

It is an amenable number.

51384916 is a deficient number, since it is larger than the sum of its proper divisors (46713644).

51384916 is a wasteful number, since it uses less digits than its factorization.

51384916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167854 (or 1167852 counting only the distinct ones).

The product of its digits is 25920, while the sum is 37.

The square root of 51384916 is about 7168.3272804749. The cubic root of 51384916 is about 371.7736029462.

The spelling of 51384916 in words is "fifty-one million, three hundred eighty-four thousand, nine hundred sixteen".